JP2523638Y2 - Vertical adjustment device for vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to a device for adjusting the height of a seat of an automobile or the like.

<Prior Art> A device capable of adjusting the angle of a seat back, as well as adjusting the seat back and front and up and down, and in particular, enabling the entire seat to be moved up and down has been disclosed in Japanese Utility Model Publication No. 56-28438.
No.

<Problem to be Solved by the Invention> In the above-described conventional device, an operation lever for vertically moving the seat is pivotally attached to a lower bracket of the seat adjuster. The lower bracket of this seat adjuster is fixed to the floor, and therefore, the position of the operation lever is always a fixed position, and when the seat is moved to the front and rear ends,
The positional relationship between the occupant and the operation lever is relatively displaced,
In some cases, there is a problem that it is not possible to finely adjust the vertical position while maintaining an appropriate driving posture.

<Means for Solving the Problems> The present invention has been improved in view of the above-described problems, and the feature of the present invention is that a front link and a rear link are respectively provided on a pair of left and right seat tracks whose front and rear positions can be adjusted. Pivotally rotatable in the front-rear direction, the seat is supported by one of the front links and the left and right rear links, the other front link is a fan-shaped ratchet, and a base plate is provided on the side surface of the seat on the other front link side. Is fixed to the base plate, and the fan-shaped main part of the other front link is pivotally supported by a hinge pin, and the base bracket is provided with a pole meshing with the ratchet of the other front link on the front side with the hinge pin as a center, A release lever is pivotally connected to the rear side so as to be rotatable, and a front end of a release arm is pivotally connected to the other front link. The release arm is connected to the release lever via a pin slidably engaged with the first guide elongated hole inclined toward the center, and a central portion of the release arm is provided with a second guide elongated hole inclined backward. An operation lever that slidably engages the long hole with the hinge pin and that rotates the release lever at the rotation fulcrum of the release lever is provided, and the release lever is constantly biased rearward between the release lever and the base bracket. That is, a spring is provided.

<Operation> With the configuration described above, the operation lever always moves up and down integrally with the seat, and the position of the operation lever always keeps a fixed position for the occupant, thereby improving operability.

An embodiment of the present invention will be described below with reference to the drawings. First
In the figure, reference numerals 1a and 1b denote a pair of left and right seat tracks whose front and rear positions can be adjusted. Front links 2a, 2b and rear links 3a, 3b are pivotally supported on the seat tracks 1a, 1b so as to be rotatable in the front-rear direction. Reference numeral 4 denotes a sheet, one of the front links 2a and 2b and one of the front links 2a and the rear links 3a and 3b.
And is supported by. The other front link indicated by A in FIG.
The 2b side has the following configuration.

As shown in FIGS. 2 and 3, the other front link 2b
Has a fan shape, which is pivotally connected 2e to the seat track 1b, and a ratchet 2c is provided on the arc surface of the fan shape.

Reference numeral 5 denotes a base bracket, which is fixed to a side surface of the seat 4. The front link 2b is attached to this base bracket 5.
Are pivotally supported by hinge pins 6.
Reference numeral 16 denotes an arc hole having the hinge pin 6 as a center. A stopper pin 17 guided slidably in the arc hole is fixed to the base plate 5, and defines a rotation range of the front link 2b.

The base bracket 5 pivotally supports a pawl 7 meshing with the ratchet 2c of the front link 2b on the front side with the hinge pin as a center, and a release lever 8 on the rear side with a shaft 9
Is rotatably pivoted through.

10 is a release arm. This release arm 10
Has a front end connected to the pawl 7 and a rear end connected to the release lever 8 via a pin 12 slidably engaged with a first guide slot 11 inclined forward.

At the center of the release arm 10, a second inclined rearward
A guide slot 13 is provided, and the second guide slot 13 is slidably engaged with the hinge pin 6.

Further, an operation lever 14 is fixed to the shaft to which the release lever 8 is fixed. Further, a spring 15 is provided between the release lever 8 and the base bracket to always urge the release lever 8 to rotate backward.

The seat 4 is always urged in the ascending direction by a spring (not shown).

Since the present invention has the structure described above, the operation lever 14
Is located on the side of the seat 4 via the base bracket 5, as can be seen in FIG.

As shown in FIG. 3, when the operation lever 14 is at the lower position, the release lever 8 is rotated rearward, and the release arm 10 is moved to the second position by the pin 12 and the first guide slot 11. The guide 7 is pulled obliquely downward and rearward by the two guide slots 13 and the hinge pin 6, and the pawl 7 is rotated rearward to mesh with the ratchet 2c of the front link 2b, thereby locking the seat 4 up and down. And

When adjusting the seat 4 up and down, as shown in FIG.
Lift the operation lever 14. As a result, the release lever 8 rotates upward, and the release arm 10 is moved obliquely upward.
At the same time, the pole 7 is pushed forward, and the pawl 7 rotates forward to disengage the front link 2b from the ratchet 2c. Therefore,
The lock of the seat 4 is released, and the seat 4 has a biasing action in the ascending direction by a spring (not shown) and can be freely moved in the up-down direction. In this state, the occupant adjusts his / her weight to the desired height, and releases the operation lever 14 at an appropriate position, whereby the release lever 8 rotates backward by the tension of the spring 15 as shown in FIG. Then, the pawl 7 is engaged with the ratchet 2c of the front link 2b via the release arm 10, and is again brought into the locked state.

By such an operation, the seat 4 is moved in the front-rear direction together with the vertical position adjustment as shown in FIG. 6, so that an appropriate seating position is obtained.

<Effects of the Invention> As described above, the present invention pivotally supports the front link and the rear link on the pair of left and right seat tracks that can be adjusted in the front-rear direction so as to be rotatable in the front-rear direction. It is supported by left and right rear links, the other front link is a fan-shaped ratchet, a base plate is fixed to the seat side on the other front link side, and the main part of the sector of the other front link is hinged to this base plate. The other front link is rotatably supported on the base bracket by a pawl that engages with the ratchet of the other front link on the front side with the hinge pin as the center, and a release lever on the rear side rotatably. The release arm is pivotally connected to the front end of the release arm, and the rear end of the release arm is connected to the release arm via a pin slidably engaged with the first guide slot inclined forward. The release arm is connected to the release lever, and a central portion of the release arm is provided with a second guide elongated hole inclined rearward, the second guide elongated hole is slidably engaged with the hinge pin, and a release lever is provided at a rotation fulcrum of the release lever. The operation lever is located on the seat side, so that the release lever is always urged to rotate backward between the release lever and the base bracket. Because it is integrated with the position change, the position of the control lever for the seated person does not change even if the seat is moved to the front and rear ends, it is possible to operate while maintaining the proper driving posture, and fine adjustments can be made in one operation It can be carried out.

Further, since the operation lever is made independent of the lock structure, the arrangement of the operation lever can be given a degree of freedom.

[Brief description of the drawings]

1 is an overall perspective view of the present invention, FIG. 2 is an exploded perspective view of a main part structure of the present invention, FIG. 3 is a side view in a locked state, and FIG.
FIG. 5 is a side view of the unlocked state, FIG. 5 is a side view of the re-locked state after adjustment, and FIG. 6 is a side view of the seat provided with the device of the present invention. 1a, 1b: seat track, 2a, 2b: front link, 2c: ratchet, 3a, 3b: rear link, 4: seat, 5: base bracket, 6: hinge pin, 7: pole, 8: release lever, 10: release Arm, 11 ... 1st guide slot, 13 ...
2nd guide slot, 14 ... operation lever, ... spring.

Claims (1)

(57) [Scope of request for utility model registration] 1. A front link and a rear link are pivotally supported on a pair of left and right seat tracks whose front and rear positions can be adjusted so as to be rotatable in the front and rear direction, and a seat is supported by one of the front links and the left and right rear links. The other front link is a fan-shaped ratchet, a base plate is fixed to the seat side on the other front link side, and the sector of the other front link is pivotally supported by a hinge pin on this base plate, and is attached to the base bracket. A pole that meshes with the ratchet of the other front link on the front side with the hinge pin as a center,
Further, a release lever is pivotally connected to the rear side so as to be rotatable, and a front end of the release arm is pivotally connected to the other front link, and a rear end of the release arm is slidable in a first guide slot inclined forward. The release arm is connected to the release lever via a pin engaged with the release arm, and a central portion of the release arm is provided with a second guide elongated hole inclined backward, and the second guide elongated hole is slidably engaged with the hinge pin. An operation lever for rotating the release lever at a rotation fulcrum of the release lever, and a spring for constantly urging the release lever to rotate rearward between the release lever and the base bracket; Up and down adjustment device.